1 files changed, 95 insertions, 0 deletions
diff --git a/unix/tclUnixEvent.c b/unix/tclUnixEvent.c
new file mode 100644
index 0000000..40aac6f
--- /dev/null
+++ b/unix/tclUnixEvent.c
@@ -0,0 +1,95 @@
+/*
+ * tclUnixEvent.c --
+ *
+ *	This file implements Unix specific event related routines.
+ *
+ * Copyright (c) 1997 by Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+#ifndef HAVE_COREFOUNDATION	/* Darwin/Mac OS X CoreFoundation notifier is
+				 * in tclMacOSXNotify.c */
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_Sleep --
+ *
+ *	Delay execution for the specified number of milliseconds.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Time passes.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tcl_Sleep(
+    int ms)			/* Number of milliseconds to sleep. */
+{
+    struct timeval delay;
+    Tcl_Time before, after, vdelay;
+
+    /*
+     * The only trick here is that select appears to return early under some
+     * conditions, so we have to check to make sure that the right amount of
+     * time really has elapsed.  If it's too early, go back to sleep again.
+     */
+
+    Tcl_GetTime(&before);
+    after = before;
+    after.sec += ms/1000;
+    after.usec += (ms%1000)*1000;
+    if (after.usec > 1000000) {
+	after.usec -= 1000000;
+	after.sec += 1;
+    }
+    while (1) {
+	/*
+	 * TIP #233: Scale from virtual time to real-time for select.
+	 */
+
+	vdelay.sec  = after.sec  - before.sec;
+	vdelay.usec = after.usec - before.usec;
+
+	if (vdelay.usec < 0) {
+	    vdelay.usec += 1000000;
+	    vdelay.sec  -= 1;
+	}
+
+	if ((vdelay.sec != 0) || (vdelay.usec != 0)) {
+	    tclScaleTimeProcPtr(&vdelay, tclTimeClientData);
+	}
+
+	delay.tv_sec  = vdelay.sec;
+	delay.tv_usec = vdelay.usec;
+
+	/*
+	 * Special note: must convert delay.tv_sec to int before comparing to
+	 * zero, since delay.tv_usec is unsigned on some platforms.
+	 */
+
+	if ((((int) delay.tv_sec) < 0)
+		|| ((delay.tv_usec == 0) && (delay.tv_sec == 0))) {
+	    break;
+	}
+	(void) select(0, (SELECT_MASK *) 0, (SELECT_MASK *) 0,
+		(SELECT_MASK *) 0, &delay);
+	Tcl_GetTime(&before);
+    }
+}
+
+#endif /* HAVE_COREFOUNDATION */
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */